Categories Computer Science DOS was introduced by Post author By esimpk Post date December 1, 2021 No Comments on DOS was introduced by A: IBM B: Xerox C: Microsoft D: Bell labs ← When you press a key, which device notifies the system software? → Which of the following operating system in based on open-source software? Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.